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S. HUSSEY.

y ROCK DRILL.

No. 330,489. A Patented Nov. 17,1885.

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Patented Nov. 17, 1885.

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SYLVANUS HUSSEY, OF SILVER CREEK, NEW YORK.

ROCK- DRILL.

SPECIFIICATIQN forming.- part of Letters Patent No. 330,489, dated November 17, 18,85. Applicatiouifiled January 29, 1884. Serial No. 119,112. (No model.)

To aZZ whom it may concern.-

Be it known that I, SYLvANUs HUssEY, of Silver Creek, in the county of Chautauqua and State of New York, have invented new and useful Improvements in Rock-Drills, of which the following is a specification.

This invention relates more particularly to that class of rock-drills which are operated by hand, and has for its object to improve the actuating mechanism whereby the drill-bar is raised, the spring mechanism whereby the blow is delivered, andthe clutch-head which seizes the drill-bar.

My invention consists to these ends in the improvements in the construction of the drill, which will be hereinafter fully set forth, and pointed out in the claims.

In the accompanying drawings, consisting of two sheets, Figure 1 is a front elevation of my improved drill. Fig 2 is a fragmentary side elevation partly inYV section. Fig. 3 is a top plan view of the mechanism whereby the drill-bar is raised. Fig. 4 is a vertical section of the geared parts of the actuating mechanism. Fig. 5 is a sectional elevation of the clutch-head on an enlarged scale. Figs. 6 and 7 are horizontal sections in lines a: x and y y, Fig. 5, respectively.v Fig. 8 is a top plan view of the lower seat-ring of the clamping-jaws. Fig. 9 is a sectional elevation of the upper seat-ring. Fig. 10 is a fragmentary sectional elevation of a modified construction of the clutch-head. tional elevation on an enlarged scale of one of the springs and connecting parts at right a'ngles to Fig. 1.

Like letters of reference refer to like parts in the several figures.

A represents the tripod-base, and A the main frame pivoted to the base in any wellknown or suitable manner.

A2 represents the swinging frame,hung upon the horizontal shaft a, and made adjustable thereon by means of arms a and segments a in a well-known manner. The shaft c is supported in bearings in the frame A.

b represents the counter-shaft,supported in bearings secured to the swinging frame A2, and b bZ are the gear-wheels secured, respectively, to the shafts a and b, whereby motion is transmitted to the shaft b from the shaft a, the latter being provided with hand-cranks as.

Fig. 11 is afragmentary secf C represents the actuating gear-segment, secured to the counter-shaft b, the two similar parts of the segment being arranged on opposite sides of the shaft with sufficient intervening spaces to permit the release of the actuating-lever D,whereby the drill-bar d is raised, and which is loosely mounted on the drivingshaft a. g

E represents a gear-segment formedA on the rear end of the lever D, and adapted to mesh with each part of the segment C, so that the rotation of the shaft b will alternately depress the rear end of the lever D and release the same. i

e e represent rollers attached to the lower end of the segment E, on both sides thereof, and f f are projecting arms or horns secured to the front end of each part of the segment C, on each side thereof, and adapted to engage against the rollers e before the teeth of the respective segments mesh, thereby setting the lever D in motion and placing it in the proper position to cause an easy and regular engagement and movement of the teeth of the respective segments. The arms f are made stronger than the teeth, thereby enabling the varms to better withstand the shocks to which they are subjected in starting the lever D and relieving the teeth from these shocks,theteeth being subjected only to the regular and easy motion of gear-wheels. The rollers e render the engagement and disengagement of the arms and the lever D easy.

ff represent rollers attached to the segment C, at the rear end of each toothed portion thereof, and adapted to engage against the rear side of the last tooth e', of the segment E, thereby rendering the disengagement of the segments easy. rlhe last tooth e', of the segment E is made of steel or other strong metal, and secured to the segment by screws or bolts, so that it can be renewed when broken. The revolving segment C is by this mechanism intermittently geared with the segment E without creating considerable friction, and the power is transmitted from the shaft b to the lever D @in a steady and uniform manner, as the relative leverage of the actuating-segment C and lever D remains substantially the same while these parts remain in engagement.

G represents the clutch-head or gripping mechanism ,through which the drill-bar passes,

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and which seizes the drill-bar both during its upward and downward movement. The lever D is provided with an elongated opening, d, through which the drill-bar passes.

g is a convex bearingpiece,which surrounds the opening cl on the upper side of the lever D, and which bears against the lower end of a sleeve, g', which depends from the clutchhead and surrounds the drill-bar.

h represents connecting-rods, pivoted with their lower ends to the lever D, nearer Athe shaft a than the point at which the piece g bears against the sleeve g', so that the portion ofthe lever Dwhich actuates the sleeve g moves through a longer arc than the portion which actuates the rods h. The upper ends of the rods h are provided with adjustable heads L, which connect with the upper portion of the clutch mechanism.

I represents the central portion of the casing of the clutch or gripping mechanism, and J the gripping-jaws, which surround the drillbar d. The jaws J, preferably three in number, are provided on their inner sides with clamping-surfaces j, and on their outer sides or backs with ribs or projections j', which are seated loosely in recesses formed inthe casing I, and extend straight across the jaws, whereby each jaw is held in place and prevented from turning with the drill-bar. The upper portion of each seat for a rib, j', is formed in the portion I of the casing, as shown at 72, and the lower portion of each seat is formed in a ring, I, as shown atjaV in Figs. 5 and 8. The ring I is held in place by the lower portion, I2, of the casing. The ribs j may be made square on their lower sides, as represented inV Fig. 10. The jaws J are provided with down; wardly-extending arms K and upwardly-ex tending arms K. The lower portions of the lower arms, K, are turned out conically on their inner sides to fit around the spreadingcone L, which is secured to the upper end of the sleeve g, and rests by aflange, Z, upon the lower head, 13, of the casing.

M represents a movable head arranged in the upper portion of the casing, and provided with an upwardly-tapering recess, m, which ts over the ends ofthe upper arms, K. The head M is provided with an annular shoulder, m', which engages under an inwardly-turned annular iiange, m2, formed on the upper portion,.I, of the casing. ai represents two laterally-projecting studs secured to the head M, and engaging in elongated holes formed in the heads h at the upper ends of the connectingrods h.

o represents asleeve surrounding the drillbar and resting upon the head M.

o is a cross-head formed on or secured to the upper end of the sleeve o, and provided with two lugs, o, to which are pivoted two outwardly-extending links, o3. The outer ends of the links o3 are pivoted to the outer ends of links o, which latter are pivoted at their inner ends to lugs o5, secured to a cross-piece, P, of the swinging frame A2.

^ q q arespiral springs coiled around two upright tubular cores or supports, gf, arranged on opposite sides of the drill-bar and secured with their lower ends to brackets g2, which are attached to the side pieces of the frame A2. r represents rods extend-ing downwardly from the links o* into the tubes q', and provided at their lower ends with cross-pieces o", which project outwardly through vertical slots r2 in the tubes q. The lower ends of the springs q rest upon rings or washers r3, which latter restin turn upon the cross-pieces r.

. The upper ends of the springs q bear against screw-nuts r4, which are applied to the externally-screw-threaded upper ends of the tubes q. By raising and lowering the nuts r* the tension of the springs is regulated in such manner that the springs are not entirely released when the drill-bar rests upon the rock, thereby keeping the drill-bar under sufficient pressure at the end of its downward stroke to prevent it from rebounding. This arrangement of the springs permits the employment of long springs without increasing the height ofthe machine, and reduces the compressing movement of the springs, thereby preventing the rapid wear of the springs. When the drill-bar rests upon the rock,theparts arein the position represented in Fig.2, with the bearin gpiece g slightly below the sleeve g', the latter being adjusted by the screw-thread at its upper end to assume this position when the spreading-cone rests upon the lower head, I, ofthe clutch-casing. As the front end of the lever D moves upwardly, the rods h first lift the upper head, M, and.disengage it from the upper arms, K', of the clampingjaws J. The head M next lifts the clutch-casing by the shoulder m engaging under the flange m,there` by raising the released clamping-jaws J on the drill-bar. The bearing-piece g, traveling with greater speedthan the rods h, next comes in contact with the lower end of the sleeve y and raises the latter and the spreading-cone L, Vthereby spreading the lower arms, K, of the jaws J and tightening the latter on the drill-bar. The distance through which the jawsJ are raised in this manner on the drill- `bar before they are tightened constitutes the feed. During the remainder of the upward movement of the lever D the sleeve g rises faster than the rods h and the upper head, M, is retarded by the pressure of the springs, and comes in contact with the upper arms, K', the studs n rising in the slots of the upper heads, h. The sleeve o rises with the head M, thereby raising the rods r and compressing the springs q. This continues until `the actuating-segment C clears the segment E ofthelever D, when the rod dis forced down by the reaction of the springs. At the end of the downward movement the spreading-head L drops away from the lower arms, K, and the parts are again in position for the next upward movement.

I do not intend to claim in this application the improvements in the clutch-head which IOC IIO

are claimed in my prior application, iled January 25, 1883, No. 83,031, nor the improvements in the actuating mechanism, clutchhead, and feed mechanism claimed in my pending application No. 148,883, filed November 26, 1884.

I claim as my invention- 1. The combination, with the drill-bar and clutch mechanism, of the lifting-lever D, having a gear-segment, E, provided with startingrollers e, and an actuating gear-segment, C, having starting-arms f, substantially as set forth.

2. The combination, with the drill-bar and clutch mechanism, of the lifting-lever D, having a gear-segment, E, and an actuating gearsegment, C, having a releasing-roller, f', substantially as set forth.

3. The combination, with thedrill-bar and clutch-head, of the lifting-lever D, having a gear-segment, E, provided with starting-rollers e, and an actuating gear-segment, O, having starting-armsf, and a releasing-roller, f', substantially as set forth.

4. The combination, with the drill-bar and clutch-head, of an actuating gear-segment, C, and a lifting-lever, D, having a gear-segment, E, provided with a detachable rear tooth, e', substantially as set forth.

5. The combination, with the drill-bar, drill-frame, and clutch-head, of the links o3, pivoted to the clutch-head, the links o4, pivoted to the drill-frame and the links o3, the rods of', attached to the links o4, and the springs q, applied to the rods r, substantially as set forth.

6. The combination, with the drill -bar, drill-frame, and clutch-head, of the links o3, pivoted to the clutch-head, the links o, pivoted to the drill-frame and the links o3, tubular supports q', secured to the drill-frame,and provided with slots r2, rods r, attached to the links 0*, and provided Within the supports q' with projections r', and springs g, substantiallyas set forth.

7. The combination, with the drill -bar, drill-frame, and the clutch-head having an upper movable head, M, of the sleeve o, resting on the head M, links o3, pivoted to the sleeve o, links opivoted to the drill-frame and the links o3, tubular supports q', rods 1^, attached to the links 0*, springs q, and screwnuts r4, substantially as set forth.

8. The combination, with the clutch-casing, of the clamping-jaws J, pivoted to said casing, an upper head, M, adapted to tighten thejaws by its downward movement and to raise the casing by its upward movement, a cone, L, adapted to tighten the jaws by its upward movement,andasingle actuating-lever connected with the upper head, M, by slotted rods h and the lower cone, L, by a sleeve, g', whose point of contact with the actuating-lever is farther from the fulcrnm of said lever than the point at which the rods h are attached thereto, to raise the upper head, the casing, and jaws in advance of the cone at the beginning of the upward stroke, to give the feed and to canse the cone to tighten the jaws on the drill-bar after the feed has been given, substantially as set forth.

Witness my hand this 21st day of January, 1884.

SYLVANUS HUSSEY. 

